The baby koala was only the size of a kidney bean when she was born in July. But because koalas keep growing for six months inside their mother’s pouch, Nappi said they weren’t sure until December that she was there.

“You don’t want to be intrusive. You sometimes want to just let nature take its course,” said Nappi. “So we chose to check at a later date when we felt the koala baby would be more developed.”

The koala will be on view daily from 11 to 4. She doesn’t have a name yet, as the zoo plans to auction off the naming opportunity at a fundraiser next month.